Bieber's mentor Usher put together a tribute piece about the pop star for the magazine, writing, "From the minute I met Justin, I knew this kid possessed a certain confidence that only a star could have. He was born a star... The reality of who he is and what he's accomplished far exceeds anybody's expectations of him."

Prince William and and his bride-to-be Kate Middleton also make the list ahead of their upcoming royal wedding next week, while other stars included in the top 100 are British Oscar-winner Colin Firth, singer Bruno Mars, actor Mark Wahlberg and "Glee"'s Chris Colfer.